[Boatanchors] Using a SG-230 tuner on AM

[Carl]

Its rated at 200W PEP.

However I still have a hard time understanding how you get  4X PEP on AM.

For 100% modulation it requires 50% of the RF plate input power. So thats 
50W of audio on a 100W input final. At 70% efficiency thats 70W carrier and 
50W of total audio using a rather conventional 1:1 modulation transformer 
ratio.

For a Viking I at 100W out that is 140W input which requires 70W audio. That 
comes out at 170W PEP in my book.

Carl
KM1H


----- Original Message ----- 
From: "D C *Mac* Macdonald" <k2gkk at hotmail.com>
To: "KM1H Carl Huether" <km1h at jeremy.mv.com>; <boatanchors at mailman.qth.net>
Sent: Sunday, August 09, 2009 3:26 PM
Subject: RE: [Boatanchors] Using a SG-230 tuner on AM



Carl and otherson the boatanchors list:

I believe the SGC-230 is rated at 125 Watts PEP.

Since the Viking, DX-100, 32V-*, B&W, etc. ran
close to 120 Watts carrier, 100% modulation would
cause PEP output to be 400-500 Watts.

I don't believe it advisable to risk running that
sort of power into the SGC.

I'm pretty sure most list members are aware of that
fact but I believe that it bears refreshing.

73 - Mac, K2GKK/5
Oklahoma City, OK


----------------------------------------
> From: km1h at jeremy.mv.com
> To: boatanchors at mailman.qth.net
> Date: Sun, 9 Aug 2009 14:30:11 -0400
> Subject: [Boatanchors] Using a SG-230 tuner on AM
>
> Has anyone tried running a 100W output AM rig thru one of these?
>
> Id like to be able to be able to run a Viking I or II thru one using a 160
> and 75M dipole in parallel for 160-20M.
>
> Carl
> KM1H
>=